if you go to LANs the aluminium will make a big difference, if however you just want to keep it at a fixed location there is not really a valid reason for taking the Alu one, cause temperature wise they are equal

I was taking the picture of the cases with BlackRabbit (my arm is in on the pictures ) and the Chieftec ALU came in 2nd weight-wise

the Imperial is very nice case, but the airflow sux! I have bought one for me from Comtech, and I'm disappointed by the airflow, I have to put a DELTA 5400rpm on my ALPHA8045 to get temps of my XP1700+ @ 1.75v under 40°C idle
In my previous case (HQ45) with 2x 90mm casefans, the temperature was under load 36°C !! and this with a XP1600+@1800Mhz using 1.85v

The imperial is nice, but airflow is a disaster, if you put a fan in the side of the case, you can expect a drop of 10°C easily though

Madshrimps has got their hands on four aluminium cases for a shootout.

So, the question now is: is the case really worth the money? In my opinion, no... I think they shouldn't include the fans, so the price could get a little lower. I also think that the case should be much cooler because of all the fans. OK, the case is beautiful and the mirror effect is pretty cool. The question I really ask myself is, "do I really need a shining case?" . If you do care about the looks and like the mirror effects etc and/or you go to LAN parties often, where you like to show of with your case, then this is the case for you!.